The analysis has been taken at the “Lunar and Planetary Laboratory” of the Arizona University, in Tucson (USA). Trace-element fingerprints were analyzed by laser-ablation inductively-coupled plasma mass-spectrometry (ICP-MS).

These elements sampled evidence that most of the chert comes from less than 1 km away, namely, from a conglomerate outcrop where chert nodules could be quarried readily. It also points to a fair likelihood that some recovered chert lithics had been brought from sources up to 30 km away from the cave.